Usage&colon;The timer switch can open or close kinds of electrical apparatus and power automatically&comma; according to preset time&comma; the items can be streetlight&comma; nion light &lpar;sign&rpar;&comma; billboard&comma; electrical appliances&comma; broadcast equipments etc&period;&comma; the digital timer switch is within rechargeable battery&comma; in 1&period;2V&sol;40mA&comma; high-accuracy CMOS chip&comma; strongly anti-jamming&comma; easy to use&period;